Question: Which chemical compound has the highest acceptable daily intake?
Paraphrase: Which chemical compound has the most noteworthy worthy every day admissions?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q11173 . ?ent wdt:P2542 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: Brilliant Blue FCF, pentachlorobenzene